import random
code_list=[]
for i in range(6):
    state=random.randint(1,3)
    if state ==1:
        first_kind=random.randint(65,90)
        random_uppercase=chr(first_kind)
        code_list.append(random_uppercase)
    elif state ==2:
        second_kinds=random.randint(97,122)
        random_lowercase=chr(second_kinds)
        code_list.append(random_lowercase)
    elif state==3:
        third_kinds=random.randint(0,9)
        code_list.append(str(third_kinds))
verification_code="".join(code_list)
print(verification_code)
